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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd5c4449b92a522327ef9e119fe3a84f5bbf0339fa1299547f982da9a30f7ecec' 
  AND token = 'sGz/5awWhRpv/oxVT0aGRj6zFqgrVItik19CanS8kbc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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