Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ae1173fd96c699cae5c0dbebf5dbcb52cf27076e1b68f34bccef0d47aaf103b1' 
  AND token = 'qaFMb0aHa7IAnoO9Pe3V86eBOWpzcgvYKY6y9z3H8zQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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