Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '938d8f28330f236394a864674eeca3cad88a2116e80590bd43b1ce62f211c1a7' 
  AND token = 'TvPbGFaRvXbfSa27Je4dd4aNPxbJO+G25yAayR/UxzI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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