Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4d13fb4b4519465542d8139779ceb4091c78aa0047c692ecd5657cdbcd72c3ca' 
  AND token = 'lWmGhvnENWAkWHey/oG1tAceCf0o6UjpwFUF5hXV6EI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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