Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c8455e303888bcecbbe7594ddfeba2f7af480257049c4573b5f1a79af2a49d3e' 
  AND token = 'NkrA0tpCXek5c+2uo8KVj3QPTrW1yF3N+4d5NZhdT0M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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