Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '50e70798ed480e8013dcc80afd1500a9e9ad9da9e016167f6412223f3a830400' 
  AND token = 'bvhYTL23ddegkLD3rEZwU3MNfsZwaCzUFpP//aU3vqM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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