Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3d49255ed39d5b7dde0f172a9d7c64bea60574bca8845f711d94e4c862862b3c' 
  AND token = 't/lqhP1YaK4fR7WSo+Nn7H+V052UhcKqhCF8Wqk0LKo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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