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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1e3b3828d162ca34b75c85d05fd1688973baa4878a5c7f0136df2e7c4430026b' 
  AND token = 'SwaOb9SK3cyaope85STDpv4AWhH2g6mQ+FK0yeVbek8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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