Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ad7d2e02c215194e8fe2e262077adcafcf88d5c4a985d6802e908745752ae262' 
  AND token = 'yLuX2n8/isWFPycDxFQf3wpNEfvrME3r86YOhyP6oJs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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