Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c0dafad32a3e76efcf08f21ca67bfb935a1cd2a728b1b35939a9c60bb7cd668a' 
  AND token = 'X2z+bzZJe34J+lkI4Mf7EHTzvrxqQky7Gf2/qOF6KE8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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