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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '03e516ec960d656266d1b42ca44760024edcdb0cb51cc95c91372d9b6eaa3ea7' 
  AND token = 'MWHutTibUNZLgSBcp+O8uEQMrzHlLKZ+juLjGpvmnDo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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