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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '81054ba9b3423f3cf8a34f850936f1161a3f54095bcaa6792a3ab5ae4e23fd27' 
  AND token = 'ZQ0+Gln3H0aY84Z8ypXstyENGmOBSigoafart9VKu/w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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