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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1af432268b6bba6df6ba18d3f89a889a875d8d7f5acdc45c71946e488ea16dca' 
  AND token = 'Wh6D306kKSICOSNRMap8k5tU6wjZ4ywr3wq/HWE/uxU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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