Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0fd306ecb226b463ba3998d625fdc135fce518006446a5193544fd92f9a91422' 
  AND token = '3RiJb+C8SJ3jEHTnmiASgySq5clwLKEyZyMLA4qv/tA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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