Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'aa0be446b36171270af3b6b94764d56f335c1cc0c07e99b05f34ca8ebf072402' 
  AND token = 'Pg0Upv0yglt2y9lq9D+9flZ4QzAaKiUujvsvQFVCWjQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00136

JSON explain

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