Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '34b7b87cff6102c4c711a1aee232857f9b04bd1c2334986477b08f944e2ea7af' 
  AND token = 'Bf6oQO6Np/fCkJXdcroQpcw8wP9ArycwOwYzkEUAxOQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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