Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b063f8019bdb3f3e7479b87cdb77a171bdc201107bd4cf8a4cd65bac82b68c87' 
  AND token = 't/o+YlQpm/fiiZncaw+w5V+KxHJygQ7LDUD1T5ilpsc=' 
  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"
    }
  }
}