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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '13150d48918ae5cd2c0343747c6b5955d4369a46f913353c29124e5ae9b8f12b' 
  AND token = 'AkABKcRpqHKHG8dRgIHzlft7m6kq6pdIcCcOgEw4x0M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00048

JSON explain

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