Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '36df49240b3d733d22a501145853fa10fabccbbcaf8cc0e7e2f563cb6070dd45' 
  AND token = '1T2yHhhfCD1kNWSllrJyg9fYsGLJ9+8Zn487pTYr5ic=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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