Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2c9a48415de65e4bbc82b1b964f7427e80d476d2adbabaccab521651cb19913c' 
  AND token = 'Bf8PHxEvKZidmfficeXx3lfDf3s+whn/zcjpRkXC6hQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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