Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cb812c0fed17a507e4f2e44bc3b62c6a3fe17615200123d78f78ccfe9707b0fa' 
  AND token = 'zR3y+NBTCJxynzZf+BA0MT9QOliWO+RpSfIdlSIRZDU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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