Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1720ca2cfd277e15fc3bf2f44b80040c0676dbe90727150bbbc745f475de20cd' 
  AND token = 'W3zLxAHewknUanZSkqL4l7k1bHHB+ZC0hi7dnFtD+dE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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