Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'daaf4f30b20a2d3ffbfdf24a9bb79a854869625517bee14ff71bedf2ac5d7fd2' 
  AND token = 'hwUE1f9cbV+Jp2TQezQAChm2ZwaCDzWrPHJzSR5aR2I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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