Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f49a9b4f86d87ebbf6a75cb346aa41d522f85189a9f1bcea0bbdd1d6e88c51ca' 
  AND token = 'pcQn2xXDg+x07ck+BPM2a/tKTH1Q18aZX6MUTa0j2mw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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