Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '68ce743b3b7e390c58132bc39bcf248f4630fe71f06200c21d5aefe7678440b7' 
  AND token = 'HNU2A7mCv6rEZ0ZOEabWWaBpm7d8IqHQZkDe7zc/VQc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00061

JSON explain

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