Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'df61f711b98d15833b1041b2974199fadf24f5b12fcd0c8534a8d2287bac2dc1' 
  AND token = 'EQlAmpU4C9qJxRXYZTCRTQSK37TRRrkW1D508qQ/IJA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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