Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd0fa1160123195eb78800a126136cd7cfec961e83c9d87377a1cbeb9901c32ab' 
  AND token = 'KL0BuCNnXe5s3qqPnC7+ufHlwRBKypy8KUBJVyXbC1o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

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