SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '862053cb61e68af1f25279f9cc35cf3987fb06d5692e1c9044ae7f9f9685a269' 
  AND token = 'KITWOpbkbBIVHRmhdpB+CGVQGKpL9TBZBmvPVV5hmzY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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