Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e5fbfda4f078670d501125c224ee9d72bd8654262ce98721ac87ed0982ba03f7' 
  AND token = 'b/VS+NeuH6YQIKirW5cvvl2K6yWk2n15v5iUb6Ensas=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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