Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f78289e20134d43dceb7898b120988c5de6103bae0c2cbf2dee1fc2054fd7eeb' 
  AND token = 'GKFpEbTrZ07lH11u9WmyPcLnigpS6677iZ3kOHkVht0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

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