Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '38e1ffa857461f6e448e8896720576886b0f6879aed866153dfc62dfa59036fc' 
  AND token = '5xHcox9s+HNcCIGUZTsFxPHScHiTyz4NJHovtPlrW5Y=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

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