Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c51bb69d61f486fd14dd956ca84e7b848d1ba2d385fedeb40636bff6bd74a676' 
  AND token = 'FOEmZHh8eKhdRlPzc2rrzzH78y/84y9zEbulaKakWh0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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