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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '09b9835689d681ab5a9cba786f078a70b28cfac09cd2a16b38c237904ac502b5' 
  AND token = 'RiIgIJVFSTfF4E0TptF3l/UazcSxeg7WeF4W8x4e9bI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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