Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5d49f92f1bbd9a1015aac83f2beb08500c787fcd36371c14ed86b5400d5eb3f0' 
  AND token = 'AOn0vnAnRANtLJmA1gXEBOWt+GH4bdIkIlvzzt99a28=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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