Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e499558787fe74040744b610035d3c3253a145bec08249c8c41033f796a1b2d6' 
  AND token = 'g04Mf+GCIRF3owi2X12EQCLJb/pn8cQG/qGKlXk7WIY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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