Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'edc09c0d67a2b24ca3b2be7d294e398e8a0e70d282b91a6eb7c6710a24fa0246' 
  AND token = 't4s787YijRQRxpH8mv0rOAMdggaxwsVbNf4OoXd6XeQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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