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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '069971ed8de87a40fe80e8b13260ec24cfa4b07c37ced91a1ed7db4a2813476d' 
  AND token = 'WPS/oqVIA3HyEnYQ8xkorunE0J6GDT/hneBZ2BJKbU8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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