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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1e14566e06902d8e6bd84198d3bdbc69a71c78e1051044551a7d6726412e6412' 
  AND token = '+Q5pZodKBKEVSnZspmCjWlBp22av+C7PSghQEFCMFIA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00066

JSON explain

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