Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '01553e8e9e639bd5819bb12a9fee5521e0a7571058436b4e4cc675320c0495ec' 
  AND token = 'vj0qzVkA5Znbc19BzOFeoqEfR3tnUqeRHjwGkpGd6wU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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