Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0431be021aef003453812ba3d417535d685b0d7d7a0758b5a954055e9e56f480' 
  AND token = 'mYGXicofzTk7yyEPzoTAcIRVe36E/FGrccSO7Yn/PDY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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