Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'adca0d1e3659e463c4cb47790cdfffb6c6de5830b0279e12a120ebda0730eb8c' 
  AND token = 'lPukvfxhrtb/KQBXK1M42ay3/GGRovK1du2IzgWEsIg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}