Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '71a117cd7ffd7023721f0ee67d7d2b3690964a19edc4c3689b8805a29badae69' 
  AND token = 'oFOZFmCE79zzitAW9+tKimr9uEVP3YQlcfVab0+m9Zg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00048

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}