Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7e6d2648fe0d43fe85ab5a0296acccde0289bf9585c2c9f2fd286d578c18f53b' 
  AND token = 'A0pzkCyvEap4JWGrHRlTFPH0rtpD5EJzkdnO/95k+Tw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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