Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f0e0df1809f16fa7bbac2a3fda50e9e60b9e4f4b57760b9f4be070622a574046' 
  AND token = '+ofQCgj6GqfBj5cQuYu50uSZzaG+iCm6BTw3FwJGwCo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00049

JSON explain

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