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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6477b5ae24cc9d11008f660a981502d8158bb20c5008e85c56b3dad320c6cd72' 
  AND token = 'Yz9Y5NWK9slampegNSLNWJRt6Iji/u9DRW6zy/jiV0w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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