Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '43ecb401f07722eecc8b6eff8d3e0355453f62b7c573448a553f52a03dc2335d' 
  AND token = 'xhSNxIK9dlURBbqeFV24+rik/Gj76EyRzbPjR3dDXO4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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