Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8bb520b590b8ad9348ea5ed403101d27982a10fc584bf63ba9a9f9242a2d873c' 
  AND token = 'qxuCHodvJLIyeANypHsQT7/rbL6cYxqL9senOUxZ/0M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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