Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8657e56ca5f423957016a6a328cc6687841c45e80fbe2d81a675f042faf67b7c' 
  AND token = 'yE/CbvkUmwsoefDGhfiIyclCayv0FK6gWwV6+2slEOs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00052

JSON explain

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