Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f8c9b6a3894d23617122fcbfa23873e774a3c700bc2055a64a4a86f9db56c2dc' 
  AND token = '2VRXFP79hRnGvFBwyAa58bs/UQ86TMW+nOI0u1d4Vus=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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