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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd3a38f31166ab3e72e14c59ac238fe2b4005f17f8b1108a55dd109c0dd5163ff' 
  AND token = 'KoBZGNl9Qojec5QZOMFKoeaa2jboylf0nI6NcCm/OK0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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