Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6617abcb2c0db87e1b7f15ef9e4c5c242b6e89652bfbccae90c762a8839b31a9' 
  AND token = 'hHpWB+X5cUTywPWpaRKcIZcS3JwvaBh4y3CPU2YQBWY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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