Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '08204b744c8567144a2501446b92424b8d3c190ab2b2e8540dd38375d65ab556' 
  AND token = 'LJ8+yE6aDoAIufVmrFd6VaZWqGbkpq/RzsrQ40OfqhY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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