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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7181566aa1c552b53522efd11b8019e7079b1ce933c68b5d0472ddb33c343f72' 
  AND token = 'MUavHAPkI7ewgL8eTP2I/+bgqafZ+baoHI0qPsSI/Hc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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