Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a8889985ebd7127e8c3312948596311b2e503dd8f0b3de7a8e6af5ddd1f75fe4' 
  AND token = 'enuYyKNn2GFH0IccwfW4hwEVX3b9MT/oqyczfevZMsE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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