Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a5d5f60f3d972fa6e5e01696a3ce7053eff404a9d159baaf0ee5fd862a09d59d' 
  AND token = 'b3FPkp/8/obNtFQd25JGUYaBQa7o3sp8og88P+A+muQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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