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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cd95067c7335b4e096fb657f9ad1b001b44d546e6502f9d7a789b4bc075534cf' 
  AND token = 'npM9IO6sc5J2xSMtzLrUxEP2zPO4VZuEocKNbjiGIG8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00010

JSON explain

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