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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8224326d214c9099792055d3105412bca8cf8dd170b233f1447b1599a9600d0e' 
  AND token = 'c/NypOpmHSE/uGtHONyrjzuPrjgk9yiy7lecjNTjuiI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00136

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}