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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '055cbc1b82a95cea7c0a0c6de2f4b1fb3083661f6b69210b89ebef25de61fc60' 
  AND token = 'wUyuSbx/p2DFqrS8quXAK/xTz7Q/Ctxf5PgBfwpglFw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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