Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '12d7d138d865e397ecbd9aead200ea907c5779144b2c22185f23109447d4f349' 
  AND token = 'aDUC3J33oFl/izFDMVNhHmwNVFzqiD85k6Z7BDE44jI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

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