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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd97550e096e32836599b20ee448b7fe32c5854d2b3dd85b9d66249abe1e6d970' 
  AND token = '9ovBbAjmDQ1GgA8PFTEmGn2u3XOkl1tzOwYPSBvIh18=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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