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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7d619a6cc52f1a5b38d8669b96bf9a460f59dcd85fe2807a928f21618b840cb1' 
  AND token = 'wqUQpbbujpwJc1bx/3m40/9iXafoi6jjwm6tTJO6eds=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00050

JSON explain

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