Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '279c64827d8732256a838411230c3bdd661c06f0b7a99d156e48f8bf464f7654' 
  AND token = 'eXJe7pERGH+GMSfyZ0cQkkEv0OxVvrXxNyCiZtwF3PQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00014

JSON explain

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